GeForce 820M vs GeForce 9600 GSO 768MB

Intro

Compare all that to the GeForce 9600 GSO 768MB, which has GPU core speed of 550 MHz, and 768 MB of GDDR3 RAM set to run at 800 MHz through a 192-bit bus. It also features 96 SPUs, 48 Texture Address Units, and 12 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce 9600 GSO 768MB		84 Watts
	Difference: 69 Watts (460%)

Memory Bandwidth

The GeForce 9600 GSO 768MB should theoretically be a lot faster than the GeForce 820M overall. (explain)

GeForce 9600 GSO 768MB		38400 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 22400 (140%)

Texel Rate

The GeForce 9600 GSO 768MB is a lot (about 129%) better at texture filtering than the GeForce 820M. (explain)

GeForce 9600 GSO 768MB		26400 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 14896 (129%)

Pixel Rate

The GeForce 9600 GSO 768MB should be quite a bit (about 129%) better at AA than the GeForce 820M, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce 9600 GSO 768MB		6600 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 3724 (129%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.